STOCKHOLDERS' EQUITY (Details) - USD ($) shares in Thousands	12 Months Ended			34 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Oct. 31, 2017	Oct. 30, 2017
Class of Stock [Line Items]
Repurchases of common stock	$ 48,971,000	$ 22,188,000	$ 73,347,000
Common Stock
Class of Stock [Line Items]
Stock repurchase program, authorized amount					$ 600,000,000	$ 300,000,000
Repurchase of common stock (in shares)	907	453	1,422	4,800
Repurchases of common stock	$ 9,000	$ 4,000	$ 14,000	$ 248,800,000
Stock repurchase program, remaining authorized repurchase amount	351,200,000			$ 351,200,000
Additional Paid-in Capital
Class of Stock [Line Items]
Repurchases of common stock	$ 48,962,000	$ 22,184,000	$ 73,333,000